Study Of Slope Stability Based On Limit Equilibrium Method & Finite Element Method

Along with the development of national economy, especially with the execution of west exploitation policy, basic establishment constructions, such as water conservancy, railway, highway & city construction, etc, are in the ascendant. Slope stability analysis is involved in all these engineerings without exception. Therefore slope stability analysis is a basic problem that must be attached importance to. All the while, study for stability is a hot & difficult point in engineering.In this paper, explicit solution for Bishop method is deduced on the base of stress distributing along the slip surface which is assumed beforehand. Moreover, optimization method for slip surface is introduced in the following process. The whole process is so simple that easily mastered by engineers. Furthermore, the forms of slip surface are generalized into conic curve no longer taking the magnitude of cohesion into account. And the method of slope stability analysis for anchor-reinforced or discharged slope is also presented.Based on the theory of Finite Element Method, the factor of safety of slope stability is straight obtained by examining the convergence of calculation after making material strength reduced. According to the result, the location of slip surface is confirmed by the plastic strain contour lines. Therefore, two parameters, the factor of safety & location of the slip surface, which play important roles in slope stability analysis are all given by the above way.For an engineering example, the methods in this paper are used to take a stability analysis by selecting a certain section.